On Thursday, Charles Harder, Trump’s lawyer, sent a letter to Wolff and Steve Rubin, the president of Henry Holt, demanding they “immediately cease and desist from any further publication, release or dissemination of the book,” as well as any excerpts or summaries of its content, according to a copy obtained by the Washington Post.

In the letter, Wolff and Rubin are accused of publishing “false” and “baseless” statements about Trump. Harder threatened to sue for “defamation by libel, defamation by libel per se, false light invasion of privacy, tortious interference with contractual relations, and inducement of breach of contract.”

Specifically, it alleges Wolff and Rubin of “reckless disregard for the truth,” which he says can be proven in a statement in the introduction that claims the book contains “untrue statements.” Harder also said the book does not cite any sources for several statements and many of the sources the book does cite have said they never spoke to Wolff.

Trump’s legal team is demanding Henry Holt immediately send them a copy of the full text so they can “fully assess all of the statements” made in the book.

Harder adds that any attempts to publish the book could result in “substantial monetary damages and punitive damages.”

The letter also states that Steve Bannon, former White House chief strategist, violated “several provisions” of an agreement he signed with the Trump organisation, which prohibits him from “communicating with any members of the print or electronic media about Mr. Trump, or any of his family members, or any of their businesses, or the campaign.”

On Wednesday, Trump’s lawyers also sent a cease and desist letter to Bannon, demanding that he refrain from making any “disparaging” comments about the president and his family.

“You [Bannon] have breached the Agreement by, among other things, communicating with author Michael Wolff about Mr. Trump, his family members, and the Company, disclosing Confidential Information to Mr. Wolff, and making disparaging statements and in some cases outright defamatory statements to Mr. Wolff about Mr. Trump, his family members, and the Company, knowing that they would be included in Mr. Wolff’s book and publicity surrounding the marketing and sale of his book,” Harder wrote to Bannon, according to ABC News.

In his book, Wolff portrays the White House as divided and chaotic and quotes Bannon describing a 2016 meeting at Trump Tower between a Russian lawyer and Trump’s son and son-in-law as “treasonous.”

On Wednesday, Trump fired back with an official statement from the White House, attacking Bannon for leaking false information to the media in order to “make himself seem far more important that he was.”

At a White House press briefing Thursday, Press Secretary Sarah Huckabee Sanders said the book had “numerous mistakes” and called it a “complete fantasy.”

“This book is mistake, after mistake, after mistake,” Huckabee Sanders said.